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2012-05-10and another bug in setbit, etc. macros..Rich Felker-1/+1
2012-05-10fix typo in sys/param.h that broke setbit, etc. macrosRich Felker-1/+1
this is all junk, but some programs use it.
2012-05-09omit declaration of basename wrongly interpreted as prototype in C++Rich Felker-0/+2
the non-prototype declaration of basename in string.h is an ugly compromise to avoid breaking 2 types of broken software: 1. programs which assume basename is declared in string.h and thus would suffer from dangerous pointer-truncation if an implicit declaration were used. 2. programs which include string.h with _GNU_SOURCE defined but then declare their own prototype for basename using the incorrect GNU signature for the function (which would clash with a correct prototype). however, since C++ does not have non-prototype declarations and interprets them as prototypes for a function with no arguments, we must omit it when compiling C++ code. thankfully, all known broken apps that suffer from the above issues are written in C, not C++.
2012-05-06some extra legacy header stuffRich Felker-0/+32
2012-05-06take byte order from gcc if gcc has defined itRich Felker-0/+4
this only works with gcc 4.6 and later, but it allows us to support non-default endianness on archs like arm, mips, ppc, etc. that can do both without having separate header sets for both variants, and it saves one #include even on fixed-endianness archs like x86.
2012-05-06add isastream (obsolete STREAMS junk)Rich Felker-1/+2
apparently some packages see stropts.h and want to be able to use this. the implementation checks that the file descriptor is valid by using fcntl/F_GETFD so it can report an error if not (as specified).
2012-05-05fix definitions of FP_ILOGB constantsRich Felker-2/+2
two issues: (1) the type was wrong (unsigned instead of signed int), and (2) the value of FP_ILOGBNAN should be INT_MIN rather than INT_MAX to match the ABI. this is also much more useful since INT_MAX corresponds to a valid input (infinity). the standard would allow us to set FP_ILOGB0 to -INT_MAX instead of INT_MIN, which would give us distinct values for ilogb(0) and ilogb(NAN), but the benefit seems way too small to justify ignoring the ABI. note that the macro is just a "portable" (to any twos complement system where signed and unsigned int have the same width) way to write INT_MIN without needing limits.h. it's valid to use this method since these macros are not required to work in #if directives.
2012-05-04add *64 junk for sys/*.h headersRich Felker-0/+50
2012-05-04add support for ugly *64 functions with _LARGEFILE64_SOURCERich Felker-0/+68
musl does not support legacy 32-bit-off_t whatsoever. off_t is always 64 bit, and correct programs that use off_t and the standard functions will just work out of the box. (on glibc, they would require -D_FILE_OFFSET_BITS=64 to work.) however, some programs instead define _LARGEFILE64_SOURCE and use alternate versions of all the standard types and functions with "64" appended to their names. we do not want code to actually get linked against these functions (it's ugly and inconsistent), so macros are used instead of prototypes with weak aliases in the library itself. eventually the weak aliases may be added at the library level for the sake of using code that was originally built against glibc, but the macros will still be the desired solution in the headers.
2012-05-03uglify headers for the sake of junk that compiles with gcc -std=c89/-ansiRich Felker-6/+24
2012-05-03add additional compatibility union member for ipv6 addressesRich Felker-0/+2
in6_* is in the reserved namespace, so this is valid
2012-05-01remove minimal linux kernel headersRich Felker-621/+0
these were at best of limited usefulness (for bootstrapping new systems, mainly) and at worst caused real kernel headers to get overwritten when upgrading libc. in case they're needed by anyone, the exact same files are now available in a new git repository: git://git.etalabs.net/mini-lkh
2012-05-01support alternate glibc name pow10 for exp10Rich Felker-0/+3
2012-04-30first try at writing an efficient and "correct" exp10Rich Felker-0/+4
this is a nonstandard function so it's not clear what conditions it should satisfy. my intent is that it be fast and exact for positive integral exponents when the result fits in the destination type, and fast and correctly rounded for small negative integral exponents. otherwise we aim for at most 1ulp error; it seems to differ from pow by at most 1ulp and it's often 2-5 times faster than pow.
2012-04-29add linux-specific unshare syscall wrapperRich Felker-0/+1
2012-04-22implement getusershell, etc. legacy functionsRich Felker-0/+3
I actually wrote these a month ago but forgot to integrate them. ugly, probably-harmful-to-use functions, but some legacy apps want them...
2012-04-22getdtablesize is not standard; move it to its correct spot in unistd.hRich Felker-1/+1
2012-04-22fix breakage in endian.hRich Felker-1/+1
2012-04-22add some ugly byte swapping cruft in endian.hRich Felker-0/+59
2012-04-22add getresuid and getresgid syscall wrappersRich Felker-0/+2
2012-04-18fix header typoRich Felker-1/+1
2012-04-18legacy junk compatibility grab-bagRich Felker-7/+34
- add the rest of the junk traditionally in sys/param.h - add prototypes for some nonstandard functions - add _GNU_SOURCE to their source files so the compiler can check proto
2012-04-18fix incorrect macro name for MATH_ERREXCEPT in math.hRich Felker-1/+1
2012-04-15move F_DUPFD_CLOEXEC out of bitsRich Felker-0/+2
fcntl values 1024 and up are universal, arch-independent. later I'll add some of the other linux-specific ones for notify, leases, pipe size, etc. here too.
2012-04-13rename __sa_restorer to sa_restorer in struct sigactionRich Felker-1/+1
this is legal since sa_* is in the reserved namespace for signal.h, per posix. note that the sa_restorer field is not used anywhere, so programs that are trying to use it may still break, but at least they'll compile. if it turns out such programs actually need to be able to set their own sa_restorer to function properly, i'll add the necessary code to sigaction.c later.
2012-04-09fix alloca issue in stdlib.h tooRich Felker-1/+1
I forgot _GNU_SOURCE also has it declared here...
2012-04-09alloca cannot be a function. #define it to the gcc builtin if possibleRich Felker-0/+4
gcc makes this mapping by default anyway, but it will be disabled by -fno-builtin (and presumably by -std=c99 or similar). for the main program the error will be reported by the linker, and the issue can easily be fixed, but for dynamic-loaded so files, the error cannot be detected until dlopen time, at which point it has become very obscure.
2012-04-03remove useless (at best, harmful) feature test checks in aio.hRich Felker-5/+0
2012-03-30optimize signbit macroRich Felker-2/+2
2012-03-30make math.h more c++-friendlyRich Felker-2/+5
2012-03-22simplify creal and cimag macrosRich Felker-8/+8
2012-03-22add creal/cimag macros in complex.h (and use them in the functions defs)Rich Felker-0/+11
2012-03-22tgmath.h: suppress any existing macro definitions before defining macrosRich Felker-0/+63
this is necessary so that we can freely add macro versions of some of the math/complex functions without worrying about breaking tgmath.
2012-03-21fix DECIMAL_DIG definitionsRich Felker-2/+0
DECIMAL_DIG is not the same as LDBL_DIG type_DIG is the maximimum number of decimal digits that can survive a round trip from decimal to type and back to decimal. DECIMAL_DIG is the minimum number of decimal digits required in order for any floating point type to survive the round trip to decimal and back, and it is generally larger than LDBL_DIG. since the exact formula is non-trivial, and defining it larger than necessary may be legal but wasteful, just define the right value in bits/float.h.
2012-03-21initial, very primitive strfmonRich Felker-0/+21
2012-03-20limits.h: support gcc's -funsigned-charRich Felker-2/+10
some software apparently uses this and breaks with musl due to mismatching definitions...
2012-03-17move nonstandard gamma() etc. to _GNU_SOURCE onlyRich Felker-4/+4
it's not even provided in the library at the moment, but could easily be provided with weak aliases if desired.
2012-03-17c++ seems to want some casts in the float representation-access macrosRich Felker-2/+2
2012-03-15in math.h make lgamma_r and non-double bessel _GNU_SOURCE onlynsz-20/+18
long double and float bessel functions are no longer xsi extensions
2012-03-15efficient sincos based on sin and cosnsz-0/+4
2012-03-13first commit of the new libm!Rich Felker-9/+354
thanks to the hard work of Szabolcs Nagy (nsz), identifying the best (from correctness and license standpoint) implementations from freebsd and openbsd and cleaning them up! musl should now fully support c99 float and long double math functions, and has near-complete complex math support. tgmath should also work (fully on gcc-compatible compilers, and mostly on any c99 compiler). based largely on commit 0376d44a890fea261506f1fc63833e7a686dca19 from nsz's libm git repo, with some additions (dummy versions of a few missing long double complex functions, etc.) by me. various cleanups still need to be made, including re-adding (if they're correct) some asm functions that were dropped.
2012-03-02fix nan/infinity macros in math.h, etc.Rich Felker-6/+8
the previous version not only failed to work in c++, but also failed to produce constant expressions, making the macros useless as initializers for objects of static storage duration. gcc 3.3 and later have builtins for these, which sadly seem to be the most "portable" solution. the alternative definitions produce exceptions (for NAN) and compiler warnings (for INFINITY) on newer versions of gcc.
2012-03-02typo in math.h c version checkRich Felker-1/+1
2012-03-02make math.h compatibe with c89Rich Felker-1/+5
2012-03-01add all missing wchar functions except floating point parsersRich Felker-0/+15
these are mostly untested and adapted directly from corresponding byte string functions and similar.
2012-03-01add memory.h, bogus legacy alias for string.hRich Felker-0/+1
2012-02-29use c++-friendly initializers for pthread initializer definitionsRich Felker-3/+3
these will also avoid obnoxious warnings with gcc -Wbraces.
2012-02-29add <syscall.h> as an alias for <sys/syscall.h>Rich Felker-0/+1
apparently some broken stuff (libstdc++) needs this.
2012-02-24replace prototype for basename in string.h with non-prototype declarationRich Felker-1/+1
GNU programs may expect the GNU version of basename, which has a different prototype (argument is const-qualified) and prototype it themselves too. of course if they're expecting the GNU behavior for the function, they'll still run into problems, but at least this eliminates some compile-time failures.
2012-02-17add get_current_dir_name functionRich Felker-0/+1
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